Oil pump and distributor drive



Oct. 15, 1929. c. L. McCUEN I OIL PUMP AND DISTRIBUTOR DRIVE Filed March 14, 1928 a a 9 .n m a ay Patented Oct. 15, 1929 UNITED STATES PATENT orrics CHARLES I1- MCOUEN, OF LANSING, MICHIGAN, ASSIGNOR T GENERAL MOTORS COR- PORATION, 0F DETROIT, MICHIGAN, A CORPORATION OF DELAYVARE OIL PUMP AND DISTRIBUTOR DRIVE This invention relates to internal combustion engines such as are used for furnishing motive power for motor vehicles, and more particularly to an improvement in engine accessory driving mechanism.

It is among the objects of the invention to provide a drive for such parts as the oil pump and the distributor or timing device for the ignition system, that will be simple and economical in construction, afford a compact engine assembly and permit easy access to the parts and the ready removal for replacement or repair.

Other objects will be apparent from the following specification taken in connection with the accompanying drawing, wherein Figure 1 is a transverse sectional view of a multiple cylinder engine, and is taken on a line intermediate the two middle cylinder Figure 2 is a detail sectional view 011 a slightly larger scale, of the driving mechanism shown in Figure 1.

Referring to the drawings, the reference characters 1 and 2 refer to the conventional intake and exhaust manifolds leading to and from the combustion chambers within the cylinder block 8, having a head 4% removably secured thereto by a series of bolts 5. The valves controlling the intake and exhaust of gases are controlled by a camshaft 6 driven as by means of a chain or gearing from the engine crankshaft 7, in timed relation with the rotation of the crankshaft. The camshaft is also provided with a driving element or worm gear which meshes with a driven ele ment or pinion gear 9, having a bearing portion or shaft section 10, carried by a bracket, comprising a plate portion 11 removably secured over an opening in the side wall of the engine crankcase by means of bolts 12, and an inwardly extending projection 18.

At the lower end of the shaft section 10, a sleeve 1a is secured by a rivet or pin 15. The upper portion of the bracket 13 is pro vidcd with a bearing bushing 17 for the shaft section, and also has a diagonally disposed oil passage or opening 18 which permits oil to reach the shaft and be distributed by means of the helical oil groove 19 in the periphery of the shaft.

The top of the gear element 9 carries a projection 21 in which the opening 22 is drilled and which carries a pin 23. The lower end of a shaft section 25 extends within the opening 22 and is grooved or notched to fit over the pin 23, while the upper end of the shaft section 25 drives the distributor mechanism 26 removably carried by a bracket 27 on the top of the engine where short lead wires may be used to connect with the spark plug terminals.

The lower end of the shaft section 10 is provided with a tongue 30, and a shaft section 31 is provided with a groove or notch which fits over the tongue 30 and extends into the sleeve 14C. The shaft 31 drives an oil pump 32 located in the oil pan 33 and having an outlet conduit 34 leading to several branch conduits communicating with the bearings to be lubricated.

From the above description it will be apparent that the connections between the shaft sections are such as to permit quick detach-- ment thereof whereby either the distributor or the oil pump may be removed from the drive section. 10 without disturbing the relation between the gear elements.

It will also be apparent that upon removal of either accessory shaft section the driving shaft and bracket therefor may be removed as a unit without necessitating disassembly of the engine.

I claim:

1. In an internal combustion engine, an engine block having an opening in a side wall thereof, a drive shaft journaled in the block and located adjacent said opening, a driven shaft formed in detachable sections, one of which is engageable with said drive shaft and a removable cover plate completely closing said opening and having an inwardly and laterally projecting bearin support for said driven shaft section.

2. In an internal combustion engine, a crankcase having an opening in the side wall thereof, a drive shaft positionedadj acent said opening, a sectional driven shaft extending into the crankcase and across said opening, and having one of its sections in driving engagement with said drive shaft, and a cover thereof, a cam shaft mou'nted in the crankcase and having a drive gear opposite said opening, a cover plate removably secured over said opening and having a laterally projecting head extending into the crankcase, and a shaft journaled in said head and carrying a gear for driving engagement with said drive gear on the cam shaft.

4. The structure of claim 3 wherein the top of the head is provided witha lubricant pocket from which leads a passageway to the bearing surfaces of the shaft and head;

5. In an internal combustion engine, a crankcase having .an opening in the wall thereof, adrive shaft'journaled in the crankcase and having a drive element adjacent said crankcase opening, a cover removably secured at the opening and having a lateral portion extending into the crankcase, a shaft section journaled in said portion and removable therewith and having an element for driving engagement with said drive element, and an accessory shaft section having detachable keyed engagement with the driven shaft section. V

6. In an internal I combustion engine, a crankcase having an opening in the wall thereof, a drive shaft j ournaled in the crankcase and having a drive element adjacent said crankcase opening, a cover removably secured over the crankcase opening and having a lateral projection extending into the crankcase, a shaft section journaled in said projection and removable therewith and having a driven element engageable with said drive element, and a pair of accessory shaft sections having tongue and groove detachable engagement with opposite ends of said driven shaft section.

7. In an internal combustion engine, a crankcase having an opening in the side wall thereof, a cover plate removably secured over said opening and having an inwardly extend- 7 ing head projecting into said crankcase, a

cured over an opening in the side wall of the engine and a head portion extending laterally from the plate-like portion, insertable thru said opening and having a bore in which one of the shaft sections is rotatably secured in driving engagement with the other of said shafts.

In testimony whereof I affix my signature.

CHARLES L. MoCUEN. 

